rstudio/src/cpp/core/FileSerializer.cpp at master · UXScripts/rstudio · GitHub

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* FileSerializer.cpp

* This program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include <core/FileSerializer.hpp>

#include <utility>

#include <iostream>

#include <sstream>

#include <boost/algorithm/string/trim.hpp>

#include <boost/algorithm/string/predicate.hpp>

#include <boost/iostreams/copy.hpp>

#include <core/FilePath.hpp>

#include <core/StringUtils.hpp>

namespace core {

std::string stringifyStringPair(const std::pair<std::string,std::string>& pair)

{

return pair.first + "=\"" + string_utils::jsonLiteralEscape(pair.second) + "\"" ;

}

Error writeStringMapToFile(const core::FilePath& filePath,

const std::map<std::string,std::string>& map)

{

return writeCollectionToFile<std::map<std::string,std::string> >(

filePath,

map,

stringifyStringPair) ;

}

ReadCollectionAction parseStringPair(

const std::string& line,

std::pair<const std::string,std::string>* pPair)

{

std::string::size_type pos = line.find("=") ;

if ( pos != std::string::npos )

{

std::string name = line.substr(0, pos) ;

boost::algorithm::trim(name);

std::string value = line.substr(pos + 1) ;

boost::algorithm::trim(value) ;

if (value.length() >= 2 && value[0] == '"' && value[value.length() - 1] == '"')

{

value = string_utils::jsonLiteralUnescape(value);

}

// HACK: workaround the fact that std::map uses const for the Key

std::string* pFirst = const_cast<std::string*>(&(pPair->first)) ;

*pFirst = name ;

pPair->second = value ;

return ReadCollectionAddLine ;

}

else

{

return ReadCollectionIgnoreLine;

}

Error readStringMapFromFile(const core::FilePath& filePath,

std::map<std::string,std::string>* pMap)

{

return readCollectionFromFile<std::map<std::string,std::string> >(

filePath,

pMap,

parseStringPair) ;

}

std::string stringifyString(const std::string& str)

{

return str;

}

Error writeStringVectorToFile(const core::FilePath& filePath,

const std::vector<std::string>& vector)

{

return writeCollectionToFile<std::vector<std::string> >(filePath,

vector,

stringifyString);

}

ReadCollectionAction parseString(const std::string& line, std::string* pStr)

{

*pStr = line ;

return ReadCollectionAddLine ;

}

Error readStringVectorFromFile(const core::FilePath& filePath,

std::vector<std::string>* pVector,

bool trimAndIgnoreBlankLines)

{

return readCollectionFromFile<std::vector<std::string> > (

filePath, pVector, parseString, trimAndIgnoreBlankLines);

}

Error writeStringToFile(const FilePath& filePath,

const std::string& str,

string_utils::LineEnding lineEnding)

{

using namespace boost::system::errc ;

// open file

boost::shared_ptr<std::ostream> pOfs;

Error error = filePath.open_w(&pOfs);

if (error)

return error;

try

{

// set exception mask (required for proper reporting of errors)

pOfs->exceptions(std::ostream::failbit | std::ostream::badbit);

// copy string to file

std::string normalized = str;

string_utils::convertLineEndings(&normalized, lineEnding);

std::istringstream istr(normalized);

boost::iostreams::copy(istr, *pOfs);

// return success

return Success();

}

catch(const std::exception& e)

{

Error error = systemError(boost::system::errc::io_error,

ERROR_LOCATION);

error.addProperty("what", e.what());

error.addProperty("path", filePath.absolutePath());

return error;

}

Error readStringFromFile(const FilePath& filePath,

std::string* pStr,

string_utils::LineEnding lineEnding)

{

using namespace boost::system::errc ;

// open file

boost::shared_ptr<std::istream> pIfs;

Error error = filePath.open_r(&pIfs);

if (error)

return error;

try

{

// set exception mask (required for proper reporting of errors)

pIfs->exceptions(std::istream::failbit | std::istream::badbit);

// copy file to string stream

std::ostringstream ostr;

boost::iostreams::copy(*pIfs, ostr);

*pStr = ostr.str();

string_utils::convertLineEndings(pStr, lineEnding);

// return success

return Success();

}

catch(const std::exception& e)

{

Error error = systemError(boost::system::errc::io_error,

ERROR_LOCATION);

error.addProperty("what", e.what());

error.addProperty("path", filePath.absolutePath());

return error;

}

bool stripBOM(std::string* pStr)

{

if (boost::algorithm::starts_with(*pStr, "\xEF\xBB\xBF"))

{

pStr->erase(0, 3);

return true;

}

else if (boost::algorithm::starts_with(*pStr, "\xFF\xFE"))

{

pStr->erase(0, 2);

return true;

}

else if (boost::algorithm::starts_with(*pStr, "\xFE\xFF"))

{

pStr->erase(0, 2);

return true;

}

return false;

}

} // namespace core

rstudio/src/cpp/core/FileSerializer.cpp at master · UXScripts/rstudio · GitHub

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